What are some FREE Fighter Fighter PC games with a great community?

I am looking for any Free Fighter game (or cheap if I have to buy) to play with my fellow Guild mates in Midnight Squadron until other games come out. I am looking for a Modern F-15, F-16, Mig 29, Su-27 game with a Multi-player Community so we can fly against other people. I will also accept a World War 2 game as well.

I just wanted to find a free game to play with my friends and battle others. Thank you very much

FURIOUS Fight Co Sponsored Fighter CHRISTOPHER LOPEZ (09/25/2010)

MMA Debut of Christopher THE PRIDE OF THE ALAMO Lopez of San Antonio at COWBOYS EXTREME CAGE FIGHTING in Cowboys Dance Hall San Antonio Texas

FURIOUS Fight Co Sponsored Fighter JARED PEREZ (09/25/2010

MMA Debut of JARED PEREZ of Corpus Christi at COWBOYS EXTREME CAGE FIGHTING in Cowboys Dance Hall San Antonio Texas